Plow.



P. KRUG.

PLOW.

APPLICATION FILED JUNE 5, 1914.

1,113,656. Patented 00t.13,1914.

Snow cm arrow,

rHE NORRIS PETERS 60.. PHOTO LI'IHH. WILSIIINIHUN. I. (V.

PHILIP KRUG, or. HoIsINGro v, Kansas,

PLOW.

Specification of Letters Patent.

Patented Oct. 13, 1914.

Application filed June 5,1914. Serial No. 843,207.

To all whom it may concern: Be it known that I, PHILIP KRUG, a citizenof the United States, residing at Hoisington, in the county of Bartonand State of Kansas, have invented certain new and useful Improvementsin Flows; and I do hereby declare the following to be a full, clear, andeXact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same. j

This invention relates to plows: and it consists of certain clampingdevices for se curing the plow share in place, as hereinafter fullydescribed and claimed, and permitting it to be-readily removed andreplaced.

In the drawings, Figure 1 is a front view of a plow, showing thelocation of the novel clamping devices. Fig. 2 is a bottom or rear viewof portions of the mold board and a plow share, showing the novelclamping devices, and drawn to a larger scale. Fig. 3 is a detail sideview of the middle clamping device which draws the plow share upwardlyagainst the mold board. Fig. 4 is a similar side view but shows one ofthe end clamping devices which draws the plow point laterally againstthe bottom plate.

The plow is provided with a plow share 2, a mold board 3, and asupporting standard 4, of any approved form and construction. A frog orbottom plate 5 is provided and is secured to the mold board by bolts 6so that it overlaps the rear side of the plow share. The plate 5 formsan ofiset extension of the bottom part of the mold board, which permitsthe front faces of the mold board and the plow share to be substantiallyflush with each other where they meet. The plow share preferably has alaterally projecting landside or lug 7, which has a pin 8 projectingfrom it. The frog or bottom plate 5 has a similar landside or lug 9which abuts against the lug 7 and which has a slot 10 which slips overthepin 8. The landside or lug 9 receives the end thrust of the plowshare.

Three clamping devices are provided for connecting the plow share to thebottom plate and mold board, and these clamping devices aresubstantially all alike with the exception that the middle clampingdevice has a thrust plate of a little different form from the others, aswill be more fully described hereinafter. When three clamping devicesare provided, an auxiliary frog or bottom plate 12 is preferably securedto the mold boardby a bolt 14, and which overlaps the plow share in asimilar manner to the frog or bottom plate 5. This frog or bottom plate12 is for the attachment of the clamping device which is farthest fromthe thrust lug 9, and it extends higher up the mold board than the plate5. A single frog or bottom plate may however be used.

The plow share 2 has bearing blocks 15 which are riveted to it, andwhich project downwardly from its rear side, and the bottom plates 5 and12 have slots 16 which straddle the blocks 15 and which are inclinedatan angle to the vertical to correspond to the inclination of thethrust lug 9.

Each clamping device is provided with a clamping plate 18, which has alarge rectangular hole 19 in one end portion which slipsover one of thebearing blocks, and a smaller square hole at its other end portion whichfits loosely over the nut of one of the fasteningbolts 6, and locks thenut to the bolt. These clamping plates are arranged at an acute angle tothe bottom edge of the plow share.

Each clamping device has a locking cam 21 provided with a hand lever 22for operating it, and the locking cam has a pivot pin 23 on one sidewhich rocks in a hole in the bearing block pertaining to it. A key orprojection 24 is formed on the outer end portion of the pivot pin whichprojects from the bearing block, and the bearing block has a key slot 25at one side of its hole. The key 24 normally prevents the pin fromsliding out of the hole in the block, but the cam can be detached fromthe block, when desired, by turning it around until the key is in linewith the key-way.

Each clamping plate has a hardened steel plate 26 welded to it, for thecam to bear on, and the middle clamping plate has a projecting lug 27,so that its cam may draw the plow share upwardly against the bottom edgeof the mold board. The cams of the other. two clamping plates arearranged to draw the plow share laterally against the bottom plate or'plates. Each clamping plate has also a spring fastening device 29 forits cam lever to engage with, but any other approved means may be usedto prevent the accidental outward movement of the cam lever which wouldunlock or unolamp the plow share. The levers are moved outwardly by handto release the plow share,

and provided with a slot;v of a plow share provided with a projectingbearing block which projects through the said slot, a clamping platehaving a hole which slips over the bearing block, and a locking. campivoted to the bearing block and engaging with the said clamping plate.

2. The combination, with a mold board, and a frog or bottom platesecured-thereto and provided with an inclined thrust lug and an inclinedslot; of a plow share provided with a lug which bears on the thrustlugIv and having a projecting bearing block which projects through thesaid slot, a clamping plate having a hole which slips over the'bearingblock, and a locking cam pivoted. to the bearing block and engaging withthe said clamping plate.

3.-- The con1bination, witl1 a mold board, and a frog or bottom platesecured thereto and providedfWith a slot; of a plow share having aprojecting bearing block which projects through the said slot, saidbearing block having a bearing hole provided with a rey slot on oneside, a clamping plate having. a hole which slipsover the bearing block,and a locking cam having a pin which is pivoted in the hole in thebearing block and providedwith aprojecting key on its free end portionwhich normally holds it in engagement with the block.

A The combination, with a mold board,

'anda frog or bottom plate secured thereto and provided with slots; of aplow share provided with projecting bearing blocks which project throughthe said slots, a clamping plate having holes which slip over thebearing blocks, and locking cams pivoted to the bearing blocks andengaging with the clamping plate and operating to draw the plow sharelaterally against the frog or bottom edge of the mold board.

5. The combination, with a mold board having an offset plate at itsbottom edge, saidplate being provided with a slot or opening, of a plowshare arranged against figp ies oi" this patent may be obtained for fivecents each, by addressingt the Commissioner of Eatents, Washington, D.Q.

bottom plate and also upwardly against the

